High 7.5Published Jul 30, 2026

CVE-2026-67349OpenCost < 1.121.0 Unauthenticated Helm Values Exposure and Admin Bypass

Updated under an hour ago (Oct 28, 2026, 1:40 PM ET)

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It affects opencost. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

OpenCost before 1.121.0 fails to authenticate the GET /helmValues endpoint, exposing base64-decoded HELM_VALUES environment variable containing cloud provider credentials. Additionally, adminAuthMiddleware fails open when ADMIN_TOKEN is unset, allowing unauthenticated attackers to modify GCP service account keys via POST /serviceKey to redirect billing calls.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-306
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Deferred
Record last updated: Jul 31, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

opencost opencost opencost:opencost (from the name)	before 1.121.0	CNA record

References

References

https://github.com/opencost/opencost/issues/3893	technical-description, exploit, issue-tracking
https://github.com/opencost/opencost/releases/tag/core/v1.121.0	release-notes
https://github.com/opencost/opencost/pull/3910	issue-tracking, patch
https://github.com/opencost/opencost/commit/a49a25bc2e0d6e220a131a4dc58f38ebe6ae851b	patch
https://www.vulncheck.com/advisories/opencost-unauthenticated-helm-values-exposure-and-admin-bypass	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.